• Q: How to choose a power supply adapter?

A: The module's power supply is crucial for proper operation. Ensure careful attention to it, as improper supply can lead to malfunctions. Ripple in the power supply should be minimal; excessive ripple causes increased background noise and distortion. Use a 5.5*2.1mm or 5.5*2.5mm power adapter. A 12V supply with over 5A current is recommended. Higher voltage and current yield better output power. For power voltage under 21V, use a 4ohm speaker; for 8ohm, 24V is recommended. Avoid input voltage over 24V to prevent damage. Low voltage distorts sound post-amplification. Inadequate current won't drive speakers or may cause voltage drop and poor quality. Inputting low power like 12V 1A may distort sound at max volume.

• Q: How to choose a speaker?

A: Common speakers range from 4ohm to 8ohm. No need to worry about speaker polarity. For left/right channels, connect to 10W~60W full-range or high-frequency speakers. Rated power is 50W*2. Even 10W~20W speakers work; use <15V adapter to avoid damage. No worry of speaker burnout with 50W~60W connection. Module connects 12V~24V; higher voltage means more sound/power. Speaker power mustn't exceed 60W, affecting sound quality.

• Q: How to choose Bluetooth-Compatible or AUX audio input mode?

A: If you want to use Bluetooth-Compatible for input, disconnect AUX or USB first. AUX/USB mode is preferred.

• Q: Why does the sound sound fine at low volume but get unclear when turned up?

A: If the sound distorts, try using a higher voltage/current adapter or lower the volume.

• Q: Why does the sound work fine at low volume but pause after increasing the volume?

A: Inadequate input power. Use a higher voltage/current adapter. Adapter may have intermittent power-off protection. Replace with a suitable adapter. If power supply is too high, reduce input power. If power amplifier board overheats, enhance cooling with a larger radiator.

• Q: What factors affect sound quality?

A: Sound quality isn't just about the power amplifier module; it's influenced by power supply, audio source, and the entire system. All elements matter—audio cables, power supply, tone circuit, amplifier circuit, speaker, and environment. Optimal sound quality comes when source, power supply, amplifier module, and speaker are harmonized.